Pfaffmann, Garrick. Rocky Mountain birds / written by Garrick Pfaffman ; illustrated by Hilary Forsyth. - 100 pages : color illustrations ; 23 cm. - Family field guide series ; v. 3. . - Family field guide series ; 3. . Includes bibliographic references and index. ISBN: 9781882426287 (pbk.) Subjects--Topical Terms: Birds--Rocky Mountains--Identification--Juvenile literature.Birds--Rocky Mountains--Identification.Mountain animals--West (U.S.)--Identification--Juvenile literature.Mountain animals--West (U.S.)--Identification. Dewey Class. No.: 598.0978